2 -- src/ltj-setwidth.lua
5 luatexja.load_module('base'); local ltjb = luatexja.base
6 luatexja.load_module('stack'); local ltjs = luatexja.stack
7 luatexja.load_module('jfont'); local ltjf = luatexja.jfont
8 luatexja.load_module('direction'); local ltjd = luatexja.direction
10 local setfield = node.direct.setfield
11 local getfield = node.direct.getfield
12 local getid = node.direct.getid
13 local getfont = node.direct.getfont
14 local getlist = node.direct.getlist
15 local getchar = node.direct.getchar
16 local getsubtype = node.direct.getsubtype
17 local getwhd = node.direct.getwhd or function(n)
18 return getfield(n,'width'), getfield(n,'height'),getfield(n,'depth') end
19 local setwhd = node.direct.setwhd or function(n,w,h,d)
20 setfield(n,'width',w); setfield(n,'height',h); setfield(n,'depth',d) end
21 local setchar = node.direct.setchar or function(n,c) setfield(n,'char',c) end
22 local setoffsets = node.direct.setoffsets or function(n,x,y)
23 setfield(n,'xoffset',x); setfield(n,'yoffset',y) end
24 local getoffsets = node.direct.getoffsets or function(n)
25 return getfield(n,'xoffset'), getfield(n,'yoffset') end
27 local node_traverse_id = node.direct.traverse_id
28 local node_traverse = node.direct.traverse
29 local node_new = node.direct.new
30 local node_copy = node.direct.copy
31 local node_remove = node.direct.remove
32 local node_tail = node.direct.tail
33 local node_next = node.direct.getnext or node.next
34 local has_attr = node.direct.has_attribute
35 local set_attr = node.direct.set_attribute
36 local node_insert_before = node.direct.insert_before
37 local node_insert_after = node.direct.insert_after
38 local round = tex.round
40 local id_glyph = node.id('glyph')
41 local id_kern = node.id('kern')
42 local id_hlist = node.id('hlist')
43 local id_vlist = node.id('vlist')
44 local id_rule = node.id('rule')
45 local id_math = node.id('math')
46 local id_whatsit = node.id('whatsit')
47 local sid_save = node.subtype('pdf_save')
48 local sid_restore = node.subtype('pdf_restore')
49 local sid_matrix = node.subtype('pdf_setmatrix')
50 local dir_tate = luatexja.dir_table.dir_tate
52 local attr_ykblshift = luatexbase.attributes['ltj@ykblshift']
53 local attr_tkblshift = luatexbase.attributes['ltj@tkblshift']
54 local attr_icflag = luatexbase.attributes['ltj@icflag']
56 local ltjf_font_metric_table = ltjf.font_metric_table
57 local ltjf_font_extra_info = ltjf.font_extra_info
59 local PACKED = luatexja.icflag_table.PACKED
60 local PROCESSED = luatexja.icflag_table.PROCESSED
62 local get_pr_begin_flag
64 local PROCESSED_BEGIN_FLAG = luatexja.icflag_table.PROCESSED_BEGIN_FLAG
65 local floor = math.floor
66 get_pr_begin_flag = function (p)
67 local i = has_attr(p, attr_icflag) or 0
68 return i - i%PROCESSED_BEGIN_FLAG
72 local ltjw = {} --export
73 luatexja.setwidth = ltjw
75 luatexbase.create_callback("luatexja.set_width", "data",
76 function (fstable, fmtable, char_data)
79 local call_callback = luatexbase.call_callback
81 local fshift = { down = 0, left = 0}
83 local min, max = math.min, math.max
85 local rule_subtype = (status.luatex_version>=85) and 3 or 0
88 local function capsule_glyph_yoko(p, met, char_data, head, dir)
89 if not char_data then return node_next(p), head, p end
90 fshift.down = char_data.down; fshift.left = char_data.left
91 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
92 local kbl = has_attr(p, attr_ykblshift) or 0
94 -- f*: whd specified in JFM
95 local pwidth, pheight,pdepth = getwhd(p)
96 local fwidth = char_data.width or pwidth
97 local fheight= char_data.height or pheight
98 local fdepth = char_data.depth or pdepth
99 if pwidth==fwidth then
100 -- 補正後glyph node は ht: p.height - kbl - down, dp: p.depth + min(0, kbl+down) を持つ
101 -- 設定されるべき寸法: ht: fheight - kbl, dp: fdepth + kbl
102 local ht_diff = fheight + fshift.down - pheight
103 local dp_diff = fdepth + kbl - pdepth - min(kbl + fshift.down, 0)
104 if ht_diff == 0 and dp_diff ==0 then -- offset only
105 set_attr(p, attr_icflag, PROCESSED)
106 local xo, yo = getoffsets(p)
107 setoffsets(p, xo - fshift.left, yo - kbl - fshift.down)
108 return node_next(p), head, p
109 elseif ht_diff >= 0 and dp_diff >=0 then -- rule
110 local box = node_new(id_rule,rule_subtype)
111 local xo, yo = getoffsets(p)
112 setoffsets(p, xo, yo - kbl - fshift.down)
113 setwhd(box, 0, fheight - kbl, fdepth + kbl)
114 setfield(box, 'dir', dir)
115 set_attr(box, attr_icflag, PACKED)
116 set_attr(p, attr_icflag, PROCESSED)
117 head = p and node_insert_before(head, p, box)
118 or node_insert_after(head, node_tail(head), box)
119 return node_next(p), head, p, box
124 head, q = node_remove(head, p)
125 setfield(p, 'yoffset', getfield(p, 'yoffset') -fshift.down);
126 setfield(p, 'next', nil)
127 setfield(p, 'xoffset', getfield(p, 'xoffset')
128 + char_data.align*(fwidth-pwidth) - fshift.left)
129 local box = node_new(id_hlist)
130 setwhd(box, fwidth, fheight, fdepth)
131 setfield(box, 'head', p)
132 setfield(box, 'shift', kbl)
133 setfield(box, 'dir', dir)
134 set_attr(box, attr_icflag, PACKED)
135 head = q and node_insert_before(head, q, box)
136 or node_insert_after(head, node_tail(head), box)
140 luatexja.setwidth.capsule_glyph_yoko = capsule_glyph_yoko
143 local function capsule_glyph_tate(p, met, char_data, head, dir)
144 if not char_data then return node_next(p), head end
145 local ascent, descent = met.ascent, met.descent
146 local fwidth, pwidth = char_data.width
148 local pf = getfont(p)
149 local pc = getchar(p)
151 pwidth = ltjf_font_extra_info[pf] and ltjf_font_extra_info[pf][pc]
152 and ltjf_font_extra_info[pf][pc].vwidth
153 and ltjf_font_extra_info[pf][pc].vwidth * met.size or (ascent+descent)
154 pwidth = pwidth + (met.v_advance[pc] or 0)
155 ascent = met.v_origin[pc] and ascent - met.v_origin[pc] or ascent
157 fwidth = fwidth or pwidth
158 fshift.down = char_data.down; fshift.left = char_data.left
159 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
160 local fheight = char_data.height or 0
161 local fdepth = char_data.depth or 0
163 = getfield(p, 'xoffset') + (has_attr(p,attr_tkblshift) or 0)
165 head, q = node_remove(head, p)
166 local box = node_new(id_hlist)
167 setwhd(box, fwidth, fheight, fdepth)
168 setfield(box, 'shift', y_shift)
169 setfield(box, 'dir', dir)
171 setfield(p, 'xoffset', - fshift.down)
172 setfield(p, 'yoffset', getfield(p, 'yoffset') -(ascent
173 + char_data.align*(fwidth-pwidth) - fshift.left) )
174 local ws = node_new(id_whatsit, sid_save)
175 local wm = node_new(id_whatsit, sid_matrix)
176 setfield(wm, 'data', '0 1 -1 0')
177 local pwnh = -round(0.5*getfield(p, 'width'))
178 local k2 = node_new(id_kern, 1); setfield(k2, 'kern', pwnh)
179 local k3 = node_new(id_kern, 1); setfield(k3, 'kern', -getfield(p, 'width')-pwnh)
180 local wr = node_new(id_whatsit, sid_restore)
181 setfield(box, 'head', ws)
182 setfield(ws, 'next', wm); setfield(wm, 'next', k2);
183 setfield(k2, 'next', p); setfield(p, 'next', k3);
184 setfield(k3, 'next', wr);
186 set_attr(box, attr_icflag, PACKED)
187 head = q and node_insert_before(head, q, box)
188 or node_insert_after(head, node_tail(head), box)
191 luatexja.setwidth.capsule_glyph_tate = capsule_glyph_tate
193 local function capsule_glyph_math(p, met, char_data)
194 if not char_data then return nil end
195 local fwidth, pwidth = char_data.width, getfield(p, 'width')
196 fwidth = fwidth or pwidth
197 fshift.down = char_data.down; fshift.left = char_data.left
198 fshift = call_callback("luatexja.set_width", fshift, met, char_data)
199 local fheight, fdepth = char_data.height, char_data.depth
201 = - getfield(p, 'yoffset') + (has_attr(p,attr_ykblshift) or 0)
202 setfield(p, 'yoffset', -fshift.down)
203 setfield(p, 'xoffset', getfield(p, 'xoffset') + char_data.align*(fwidth-pwidth) - fshift.left)
204 local box = node_new(id_hlist);
205 setfield(box, fwidth, fheight, fdepth)
206 setfield(box, 'head', p)
207 setfield(box, 'shift', y_shift)
208 setfield(box, 'dir', tex.mathdir)
209 set_attr(box, attr_icflag, PACKED)
212 luatexja.setwidth.capsule_glyph_math = capsule_glyph_math
215 function luatexja.setwidth.apply_ashift_math(head, last, attr_ablshift)
216 for p in node_traverse(head) do
220 elseif (has_attr(p, attr_icflag) or 0) ~= PROCESSED then
221 if pid==id_hlist or pid==id_vlist then
222 setfield(p, 'shift', getfield(p, 'shift') + (has_attr(p,attr_ablshift) or 0))
223 elseif pid==id_rule then
224 local v = has_attr(p,attr_ablshift) or 0
225 setfield(p, 'height', getfield(p, 'height')-v)
226 setfield(p, 'depth', getfield(p, 'depth')+v)
227 set_attr(p, attr_icflag, PROCESSED)
228 elseif pid==id_glyph then
229 -- 欧文文字; 和文文字は pid == id_hlist の場合で処理される
230 -- (see conv_jchar_to_hbox_A in ltj-math.lua)
231 setfield(p, 'yoffset',
232 getfield(p, 'yoffset') - (has_attr(p,attr_ablshift) or 0))
234 set_attr(p, attr_icflag, PROCESSED)
239 -- discretionary の位置補正
241 local attr_yablshift = luatexbase.attributes['ltj@yablshift']
242 local attr_tablshift = luatexbase.attributes['ltj@tablshift']
245 local function ashift_disc_inner(field)
246 local head = getfield(disc, field)
247 if not head then return end
248 local y_adjust, node_depth, adj_depth = 0, 0, 0
249 for lp in node_traverse_id(id_glyph, head) do
250 y_adjust = has_attr(lp,attr_ablshift) or 0
251 node_depth = max(getfield(lp, 'depth') + min(y_adjust, 0), node_depth)
252 adj_depth = (y_adjust>0) and max(getfield(lp, 'depth') + y_adjust, adj_depth) or adj_depth
253 setfield(lp, 'yoffset', getfield(lp, 'yoffset') - y_adjust)
255 if adj_depth>node_depth then
256 local r = node_new(id_rule,rule_subtype)
257 setfield(r, 'width', 0); setfield(r, 'height', 0)
258 setfield(r, 'depth', adj_depth); setfield(r, 'dir', tex_dir)
259 set_attr(r, attr_icflag, PROCESSED)
260 if field=='post' then
261 node_insert_after(head, head, r)
263 setfield(disc, field, (node_insert_before(head, head, r)))
267 function luatexja.setwidth.apply_ashift_disc(d, is_dir_tate, dir)
268 attr_ablshift = is_dir_tate and attr_tablshift or attr_yablshift
269 disc, tex_dir = d, dir
270 ashift_disc_inner('pre')
271 ashift_disc_inner('post')
272 ashift_disc_inner('replace')